Hyundai Accent: Heated Oxygen Sensor (HO2S). Description and Operation
Description
Heated Oxygen Sensor (HO2S) consists of zirconium and alumina
and is installed both upstream and downstream of the Manifold Catalytic Converter.
The sensor output voltage varies in accordance with the air/fuel ratio.
The sensor must be hot in order to operate normally. To keep
it hot, the sensor has a heater which is controlled by the ECM via a duty cycle
signal. When the exhaust gas temperature is lower than the specified value,
the heater warms the sensor tip.

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Install the component with the specified
torques.
•
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Specification
HO2S [Bank 1/Sensor 1]
Item
Specification
Heater Resistance (Ω)
2.4 ~ 4.0 [20°C(68°F)]
HO2S [Bank 1/Sensor 2 ...
See also:
Emergency starting
Connect cables in numerical order and disconnect in reverse order. ...
Replacement
The injector combustion seal should be replaced new one to
prevent leakage after removing the injector.
1.
Remove the combustion seal (A) with a wire cutter.
...
Necessary inspections
Fluid levels, such as engine oil, engine coolant, brake fluid, and washer fluid
should be checked on a regular basis, with the exact interval depending on the fluid.
Further details are provided i ...